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http://dx.doi.org/10.4334/JKCI.2011.23.6.791

Tension Stiffening Effect Considering Cover Thickness in Reinforced Concrete Tension Members  

Lee, Gi-Yeol (Dept. of Civil Engineering, Suncheon First College)
Kim, Min-Joong (Dept. of Civil Engineering, Chonnam National University)
Kim, Woo (Dept. of Civil Engineering, Chonnam National University)
Lee, Hwa-Min (Dept. of Computer Software Engineering, Soonchunhyang University)
Publication Information
Journal of the Korea Concrete Institute / v.23, no.6, 2011 , pp. 791-797 More about this Journal
Abstract
This paper presents the test results of 12 direct tensile specimens to investigate the effect of cover thickness on the tension stiffening behavior in axially loaded reinforced concrete tensile members. Six concrete cover thickness ratios are selected as a main experimental parameter. The results showed that, as cover thickness became thinner, more extensive split cracking along the reinforcement occurred and transverse crack spacing became smaller, making the effective tensile stiffness of thin specimens at the stabilized cracking stage to be much smaller than that of thick specimens. This observation is not implemented in the current design provisions, in which the significant reduction of tension stiffening effect can be achieved by applying thinner cover thickness. Based on the present results, a modified tension stiffening factor is proposed to account for the effect of the cover thickness.
Keywords
cover thickness; crack spacing; direct tensile member; splitting crack; tension stiffening;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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